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can_move golf, redux (#14)

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previous attempt tried to use shifts to get 0.4 to 0.2 or 0.8 and multiplication to get -0.8, forgetting that the multiplication would also turn 0.4 into 0 along the way. oops. I got ratholed on the mathematical approach, but a very straightforward lookup table can get more done.

Reviewed-on: pyrex/chameleonic#14
Co-authored-by: Kistaro Windrider <kistaro@gmail.com>
Co-committed-by: Kistaro Windrider <kistaro@gmail.com>
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Kistaro Windrider 2022-12-28 21:12:23 +00:00 committed by Pyrex
parent ad9d53887e
commit 812d619cc7
1 changed files with 3 additions and 9 deletions
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12
chameleonic.p8
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@ -531,6 +531,8 @@ function level:get_latch(dx,dy,px,py)
end end
end end
ropecheck=split"-0.8,0.4,0.2"
function level:can_move( function level:can_move(
is_player, is_player,
mx0,my0,dmx,dmy,exclude_src,exclude_dst mx0,my0,dmx,dmy,exclude_src,exclude_dst
@ -542,17 +544,9 @@ function level:can_move(
if (self:mcoll(mx1,my1) or player.x==mx1 and player.y==my1) return false if (self:mcoll(mx1,my1) or player.x==mx1 and player.y==my1) return false
if player.rope then if player.rope then
local chk=false
local w,h=1.6,0.2 local w,h=1.6,0.2
if (dmx==0) w,h=0.2,1.6 if (dmx==0) w,h=0.2,1.6
if (player.rope:collide_mrect(mx0+ropecheck[dmx+2],my0+ropecheck[dmy+2],w,h,exclude_src,exclude_dst)) return false
local rectx,recty
if (dmy==-1) rectx,recty=0.4,-0.8
if (dmy==1) rectx,recty=0.4,0.2
if (dmx==-1) rectx,recty=-0.8,0.4
if (dmx==1) rectx,recty=0.2,0.4
if (player.rope:collide_mrect(mx0+rectx,my0+recty,w,h,exclude_src,exclude_dst)) return false
end end
return true return true